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Astronomer: Proponents of the hypothesis that life evolved

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Astronomer: Proponents of the hypothesis that life evolved  [#permalink]

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New post 08 Nov 2013, 01:29
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Astronomer: Proponents of the hypothesis that life evolved extraterrestrially and drifted here in spores point out that, 3.8 billion years ago, Earth was bombarded by meteorites that would have destroyed any life already here. Yet 3.5 billion years ago, Earth had life forms complex enough to leave fossil remains. Such life could not have evolved here in the 0.3 billion years following the meteorite bombardments, they claim. There is good reason to regard their hypothesis as false, however, for they merely offer empirical arguments against the view that life evolved on Earth; neither they nor anyone else has provided positive support for the extraterrestrial-spore theory of the origin of terrestrial life.

The reasoning in the astronomer's argument is flawed because the argument

A. Reasons that a hypothesis is false simply because there is another hypothesis that is equally likely to be true.
B. Fails to justify its claim that the view being criticized is inherently implausible.
C. Concludes, simply because there is no evidence in favor of a hypothesis, that there is evidence against that hypothesis.
D. Attempts to derive a conclusion form premises that contradict it.
E. Grants the truth of claims that are made by the advocates of that hypothesis but that do nothing to strengthen the astronomer's own argument.

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Re: Astronomer: Proponents of the hypothesis that life evolved  [#permalink]

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New post 08 Nov 2013, 09:32
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There are two hypotheses being discussed here: 1) life evolved on Earth and 2) life evolved in space and then came to Earth. The astronomer lays out the argument by proponents for life evolving in space and coming to Earth. He then states that this argument is likely false, because this argument focuses on the impossibility of life evolving on Earth, but provides no solid evidence for the theory that life evolved in space and came to Earth. This is flawed because, while a lack of concrete evidence for life evolving in space and coming to Earth may provide room for an alternative explanation of some sort, this lack of evidence is not evidence AGAINST this hypothesis. Answer choice C captures this beautifully.

I hope this helps!!!
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Re: Astronomer: Proponents of the hypothesis that life evolved  [#permalink]

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New post 26 Mar 2018, 12:36
Hello from the GMAT Club VerbalBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

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Re: Astronomer: Proponents of the hypothesis that life evolved &nbs [#permalink] 26 Mar 2018, 12:36
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